Switch



INvENToR Henry D James,

ATTORNEY H. D. JAMES SWITCH Filed Nov. 29, 1921 Oct. l, 1929.

panying drawing, whereins Patented Oct:` l, 1929 UNITED STATES PATENTOFFICE HENRY D. JAMES, F EDGEWOOD,- PENNSYLVANIA, ASSIGNOB T0WESTINGHOSE ELECTRIC MANUFACTURING COMPANY, A CORPORATION OFPENNSYLVANIA SWITCH Application mea November 29, 1921. seran No.518,519.

My invention relates to switches and its has particular relation toswitches for interrupting circuits that are traversed by relativelylarge currents. I

One object of my invention isto provide a switch having all its parts soarranged that ready access thereto may be effected.

Another object of my invention is to provide 'means for readily removingan arc box from a switch upon which it is mounted.

A further object of my invention is to provide an improved blow-outdevice for extinguishing the arc that is established between the contactmembers of a switch when rupted. l f

Briefly speaking, my invention consists in providing a slidably-mountedcore member within the blow-out coil of a switch, securely i mounting aplurality of pole-pieces upon an arcbox and so mounting the arc boxuponthe switch that the pole-pieces will engage, the core member when thearc box 'occupies its operative position. Y l

For a better understanding of my invention, reference may bemade to theaccom- Figure 1 is a view, partlyin side elevation and partl-yl insection, of a switching device embodying my inventiona'd Fig. 2 is abottom plan view of a portion of an arc box that is illustrated in Fig.1V of the drawing.,

Referring particularly to Fig. 1- of the v drawing, a switch 1 comprisesa'plurality of n contact' members 2 and 3, a plurality of arc horns 4and 5, a blow-out coil 6 andan arc box 7. The blow-out coil 6,vstationary arc horn 4 and stationary contact member2 are 40v securelymounted upon a plurality of vertical mounting bars 8 which are coveredby suitable insulating material.

The stationaryarc horn 5 is secured to the vertical mounting bars 8 bymeans of a vplurality of bolts 9 `and a relatively flat moldpieces 25and ary member 14 by means of a pin 15 The.

lever 12 is actuated by a, connecting lever 16, to which it ismechanically connected by a pin 16a (indicated by broken lines).

The connectin lever 16 is mechanically connected to a plston rod 17'bymeans of a 15 the circuit comprising the switch is inter-\ pin 18. Apiston .46 is mounted within a.

cylinder 19 and is secured to the piston rod 17. The piston is actuatedby fluid pressure -which is governed fby an electromagnetic 23 and 24,on each of which is secured1 a lu- 'rality'of pole-pieces 25, 26 and 27.Eac of the side walls 23 and 24 comprises a plurality of asbestos boards23a and '24a, respectively. Pole-pieces 27 are spaced suiliciently apartto clear the coil v6 and to frictionally engage the core member 28 rthatis slidably mounted therein. The magetizablepole-pieces 26 serve asspacing members between the pole- When the arc box 7 occupies itsoperative position, the pole-pieces 25 are in side-by-A side relationwith the contact members 2 and 3 and are separated therefrom, by theasbestos boards 23a and 24a, as is illustrated by Figs. 1 and v2 of thedrawing.

A horizontal cover member 29, made of some suitable insulating material,is provided at the top of the switch 1 and is secured 5 arc horns 4 and5 from passing around the upper end of the stationary arc horn 4 to the'blow-out coil 6.

The cover member 29 is rovided with a plurality of clip angle mem ers 32(preferf ably two), which are rigidly secured thereto. The arc box 7 isprovided with a corresponding number of c lip angle members 33 which aresecured thereto. A plurality of bolts 34 are employed to mechanicallyconnect the clip angle members 32 Aand 33 together, thus securing arcbox 7 to the upper insulating member 29. A

The lower portion of the arc box 7 is provided with a plurality ofinsulating barriers 20 35 and 36. A pin 37 is secured, by means of abracket member 38 and a plurality of bolts 39, to the side members 23aand 24a of the arc box 7. The bolt 37 rests in a socket that is providedin the cylinder 19. The bracket member, or casting, 38 is provided withrelatively iiatside and bottom portions or lugs 40 and 41, respectively,to limit the rotatable movement of the arc box 7 about the pin 37.

rEhe arc box 7 may be removed from the clip angle members 32 and thenswinging the arc box in a counter-clockwise direction about the pin 37until the arc box canbe lifted upwardly from the socket 40a. i

When thearc box 7-r has been removed, the pole-pieces 25, 26 and 27 aresimultaneously removed, thereby permitting access to the blow-out coil6, arc horns 4 and 5, and cony tact members 2 and 3. The arc box 7 maybe placed infits operative position by reversing the operation that isrequired for its removal from the switch 1i f rlhe operation of theswitch is as follows z- When the electromagnetic' device 21 isenergized, fluid pressure from a port 42 passes a valve member-notillustrated-that is governed by the device 21. Fluid pressure actuatesthe piston within'the cylinder 19, thereby raising the rod 17,connecting lever 16, lever 12 and, hence, contact member 3, until it isbrought into contact with the stationary contact member 2.

When the Contact membersl 2 and 3 are in engagement, a circuit isestablished from a stationary contact terminal 43\,throiigh .theblow-out coil 6, contact members 2 and 3, and

u flexible conductor 44 to stationary terminal 45.' When themagneticdevice 21 is de-energized, 4pressure is removed from the pistonmwithi'n the cylinder 19, and a resilient member (not illustrated) alsowithin the cylinder 19, aotuates the piston rod 17 downwardly,

\ thereby separating the contactl member `3 .from Ythe contact member 2,in accordance 65 with familiar principles.

switch by irst removing the bolts 34 from the.

The arc established between the contact members 2 and 3 is forcedoutwardly, by the magnetic flux from the blow-out device, along the archorns 4 and 5, which are elec-V trically connected to the contact-members 2 and 3, respectively. The magnetic circuit constituting aportion' of the blow-out device comprises the core member 28 and thepole pieces 25, 26 and 27, which become magnetized, when the coil 6 isenergized.

From the above description, it is apparent that l have provided an arcbox having a plu' Vrality of pole-pieces secured thereto that mayreadily be'removedto permit access to lthe cont-act members and blow-outdevice of the switch.

While l have shown a switch constructed. in accordance with my inventionin its preferred form, it is apparent that minor modifications may bemade in the arrangement of the parts of the switch without departingfrom the spirit of my invention. desire, therefore, to be limited onlyby the scope of the appended claims.

1 claim as my invention 1. ln a switching device, the combination with aplurality of contact members and a blow-out coil, of an arcv box, aplurality of pole-pieces secured to said box and a pivotal support forsaid box, said support being relatively removed Jtrom said members andsaid coil and adapted to permit the removal i said box from .said deviceupon said bex oc= cupying a predeterminedposition.

2. ln a switching device, in combination, a frame, a socket carried bythe frame, an arc chute, a complementary hinge member provided on thechute for engaging in the socket to removably and pivotally mount thechute, means provided 'o n the frame for receiving the arc chute andmeans for locking. the arc chute in engagement with said re ceivingmembers.

3. ln a switching device, in combination,

a frame, a socket carried by the frame, an

arc chute adapted for mounting on the iframe,

a complementary hinge member for mounting on the chute for engaging inthe, socket to removably and'pivotally mount the chute, arc shieldscarried by the frame and disposed to receive the upper part of the arechute and means for locking the arc chute in position.

4. ln a switching'device,in combination, a frame, switching membersmounted on the frame, an arc chute for enclosing said switching members,complementary hinge members mounted on the'frame and chute for removablyand pivotally. mounting the latter, .an arc shield shaped to receive theupper side of the arc chute and means carried by the arc shield forlocking the arc chute in po- HENRY D. JAMES.

